﻿////////////////////////////////////////////////////////////////////////////////////////////////////
//
// VSCoverageToEmma - Visual Studio Coverage file to Emma converter
// Copyright (c) Kouji Matsui, All rights reserved.
//
// * Redistribution and use in source and binary forms, with or without modification,
//   are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright notice,
//   this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
//   this list of conditions and the following disclaimer in the documentation
//   and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
// IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
// EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
////////////////////////////////////////////////////////////////////////////////////////////////////

using System;
using System.Diagnostics;
using System.Runtime.InteropServices;

namespace VSCoverageToEmma.Converters
{
	internal sealed class Architecture
	{
		[DllImport("kernel32.dll")]
		private static extern IntPtr GetModuleHandle(string fileName);

		[DllImport("kernel32.dll", CharSet = CharSet.Ansi, ExactSpelling = true)]
		private static extern IntPtr GetProcAddress(IntPtr module, string symbolName);

		[DllImport("kernel32.dll", EntryPoint = "IsWow64Process")]
		private static extern bool IsWow64Process_(IntPtr process, [Out] out bool wow64);

		public static bool Is64BitProcess
		{
			get
			{
				return IntPtr.Size == 8;
			}
		}

		public static bool IsWow64Process
		{
			get
			{
				if (GetProcAddress(GetModuleHandle("kernel32.dll"), "IsWow64Process") != IntPtr.Zero)
				{
					bool wow64;
					if (IsWow64Process_(Process.GetCurrentProcess().Handle, out wow64) == true)
					{
						return wow64;
					}
				}

				return false;
			}
		}

		public static bool Is64BitOperatingSystem 
		{
			get
			{
				if (Is64BitProcess == true)
				{
					return true;
				}

				if (IsWow64Process == true)
				{
					return true;
				}
				else
				{
					return false;
				}
			}
		}
	}
}
